Septic tank



D. cloNcHl SEPTIC TANK Nov. 3,1959

Filed March 25, 195e 2 Sheets-Sheet 1 1 N VEN TOR.

Attorneys Uu/io Gionchi aou/#wey D. ClONCHl Nov. 3, 1959 SEPTIC TANK 2Sheets-Sheet 2 Filed March 25, 1.958

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United States Patent SEPTIC TANK Duilio Cionchi, New London, Coun.Application March 25, 1958, Serial No. 723,919 '3 Claims. (Cl. 210-532)'I'his invention relates generally to septic tanks and more particularlyto a novel and improved construction in septic tanks which allows foreasy assembly and more etlicient disposal of wastes.

The septic tank, comprising this invention, has been designed ofdetached elements that permit the assembling by a common laborer. Itrequires a minimum of time to put into operation and may be constructedof reinforced concrete, poured and vibrated, -using material of highresistance and a of thickness, or further, may be constructed ofaluminum, steel or plastic. The particular construction allows theseptic tank to be of hal-f the Weight'of similar capacity tanks, therebyallowing for economy Iin transportation costs.

Basically, the tank consists of three major parts. Firstly, asubstantially cylindrical outer tank constituting the first major partis utilized. Secondly, a pair of concentrically positioned speciallyconstructed hollow members constituting the second and third major partsare carried within the outer tank in such a manner that the relationshipof the outer tank and hollow members deine'particular flow paths forproper treatment ofY the iniiow.

The advantages of the novel and improved construction described belowover the prior art devices are a result of the particular design whichmaintains a complete stillness of the matter in the transformation zonesupon iilling and emptying the tank. In view of this, no pressuredevelops and no escapable gas develops. Due to the tight sealing of thestructure, air cannot gain access to the inner part thereby maintainingthe inner temperature constant resulting in an improved :action of allbacteria which facilitates the inflow of any waste material, both liquidland solid.

Further, the tank is so designed that internal inspection can be donefrom an opening in the top of the tank which permits complete control ofthe functioning of the tank. The tank may be cleaned aftera limited timeby a very simple method. The capacity of the tank, of course, may varyand it is contemplated that the teachings disclosed below may beutilized with any tank having a capacity between one gallon and tenthousand gallons and dependent on the capacity, the tanks may be usedfor any type of home, school, hotel, or for any purpose at all whereseptic tanks have been utilized.

Accordingly, it is the principal object of this invention to provide anovel and improved construction in septic tanks which enables the moreeicient removal of any waste material.

It is a further object of this invention to provide a novel and improvedconstruction in septic tanks which is capable of particularly easy andrapid assembly.

It is a further object of this invention to provide a novel and improvedseptic tank construction which may be substantially lighter in weightthan former constructions for the same capacity tank.

These together with other objects and advantages which will becomesubsequently apparent reside in the details Y 2,911,102 Patented Nov. 3,1959 ice tion illustrating the relationship of individual parts andv theilow characteristics of the inow;

Figure 2 is a sectional Iview taken substantially along the plane 2-2 ofFigure 1;

Figure 3 is a sectional View taken substantially along the plane 3-3 ofFigure l; and

Figure 4 is ia sectional view taken substantially along the plane 4--4of Figure 1.

With continuing reference to the drawings, and initial reference toFigure 1, the numeral 10 generally represents the septic tankconstruction adapted to be buried in the ground.

` The septic tank 10 includes a substantially cylindrical outer tank 12having an inflow conduit 14 communicating with the inner volume of theouter tank 12 'and an outflow conduit 16. It is to be noted that thelevel of the conduit 14 is placed somewhat above the level of theconduit 16 for facilitating the discharge of waste material through theconduit 16. The outer tank 12 includes a closed bottom portion 18 and apair of opposed shelves 20 and 22 on the inner circumference of thecylinder.v

The conduits 14 and 16 communicate with the inner volume of the tankthrough a pair of apertures as at 24 and 26. i

' A first inner hollow member 28 is supported within the outer tank 12by a circumferential flange portion 30 which rests on the shelves 20 and22 as at 32. The iirst inner hollow member 28 is substantially in theform of a pair of hollow conical frustums joined at their bases. Thecircumferential flange 30 substantially cncircles the irst inner hollowmember about the joined bases. Actually, the rst inner hollow member isan integral body and only has the shape of the pair of frustums. Y Thefrustum surfaces as 34 and 36 are open so as to pass refusetherethrough. Extending above the open frustum surface 36 is asubstantially cylindrical volume defined by the upstanding walls 38. Achannel portion 40 is defined by projecting walls 42 and 44 formedintegral with the wall of the first inner hollow member 28. The

channel bottom as at 46 communicates with the inner.

outer tank 12 to the channel shaped volume defined by` the projectingwalls 42 and 44.

A second innerhollow member 48 is likewise formed` in the shape of apair of hollow conical frustums but the second inner hollow member 48utilizes the frustums joined at their truncated surfaces. Again, it isto be noted that the inner hollow member is formed integral and thereference to conical frusturns is made only to more clearly describe thetank shape. A plurality of support hangers as at S0 and 52 are fixed tothe inner hollow member 48 along the inner edge thereof as at 54. Acorresponding plurality of shelves S6 and 58 are afxed to the surface 36of the first inner hollow member 28. As may be particularly noted inFigures 1 and 3, the support hangers 50 and 52 are adapted to sit on theshelves 56 and 58.

The inner relationships between the iirst inner hollow member 28 and thesecond inner hollow member 48 are to be noted. That is, the truncatedsurface 34 and the base 60 allow for relatively small passage betweenthe inner hollow members. The passage between the members increasestoward the vertical centers of the members and then decreases toward thetruncated surface 36 and base 62.

a The outer tank is yadapted to be closed by a xed cover plate 62 whichaccommodates the upstanding walls of the outer tank 12 and the rst innerhollow member 28 in slots defined therein. A centered opening in thecover plajte 62 accommodates a removable top cover 64 having handleremoving means as at 66 to facilitate the removal of the cover 64.

With the relationships so defined, in operation, the

outer 'and inner hollow members are lled with water to ale've'l definedby the numeral 70. Refuse material enters the tank through the conduit14 and aperture 2.4 and proceeds through the channel Volume 40 throughthe channel bottom 46 into the inner volume of the lfirst inner hollowmember 28 and thence to the bottom of the outer hollow member 12 whichis noted by the numeral 72 and 'may be defined as the rst zone ofseparation of the heavy mud and solid refuse. The refuse willsubstantially continue through the area designated at 74 of the innerhollow member 48. This area 74 'is noted as the room of transformationwhere the solution substantially decomposes. Above the surface 36approximately at the water level, a second zone of transformationdevelops. The microbes carried by the refuse ood into this area. Therefuse substantially overows the base 62 of the inner hollow member 4Sand proceeds substantially downward through the inner volume of thefirst inner hollow member 28 about the second inner hollow member 4S.The refuse falls to the area outside and below ,the first Vinner hollowmember 28 and proceeds to seep .upwardly about the shelves 20 and 22 toan area designated at 76 where substantially clear Water is dischargedthrough the outflow conduit 16.

The path of flow substantially removes the refuse as it continues alongthe path prescribed by the particular shape of the cooperating tank andhollow members. The flow is of course incited by the incoming refuse. Itis to be noted that the substantially cylindrical shape of all of thecomponent parts eliminate the possibility of the accumulation ofpollution at the corners. Further, the particular "tank constructionenables the mixed refuse, -both liquid and solid, to enter the tanks andbe conveyed to the internal separation zone where the conical shapesdecompose the refuse and force out pure water to the outiiow conduit 16.All the refuse, which `is to be transformed by intense microbe action,is retained and completely converted into salts that become eliminatedto remain .absolutely immune so that it can be spread on any regularsoil for fertilization.

The foregoing is considered as illustrative only of the principles ofthe invention. Further, since numerous modifications and changes willreadily occur to those skilled in the art, it is not desired to limitthe invention to the exact construction and operation shown anddescribed, and accordingly, al1 suitable modifications and Y 4 Aequivalents may be resorted to, falling Within the scope of theinvention vas claimed.

What is claimed as new is'as follows:

l. A septic tank construction comprising a plurality of open innerconcentric hollow members supported within and communicating with anouter tank, inlet and outlet means communicating with the inner volumeof said outer tank, and flow pasa-ges defi-ned by the walls of the tankand hollow members for directing a iluid along a prescribed ow path, aiirst of said plurality of inner hollow members being in the form ofapair of hollow conical frustums joined at their bases, a second of saidplurality of inner hollow members being in the form of a pair of hollowconical frustums joined at t-heir truncated surfaces.

2. A septic tank construction comprising a plurality of open innerconcentric hollow members supported within and communicating with anouter tank, inlet and outlet means communicating with the inner volumeof Asaid outer tank, :and flow passages defined by the walls of the tankand hollow members for directing a. fluid along .a prescribed iiow path,a first of said plurality of inner hollow Ymembers being in Vthe form ofa pair of hollow conical frustums joined at their bases, a second ofsaid plurality of inner hollow members being in they form of a pair ofhollow conical frustums joined at their truncated surfaces, said firstinner hollow member carried within and by said outer tank, said secondinner hollow member carried within and by said first inner hollowmember.

3. A septic tank construction comprising a plurality of open innerconcentric hollow members ysupported within and communicating with anouter tank, inlet and outlet means communicating with the inner volumeVof said outer tank, and flow passages defined by the walls of the tankand hollow members for vdirecting a fluid along a prescribed flow path,a first of said plurality .of inner 'hollow members being in the form ofa pair of -hollow conical frustums joined at their bases,l a second ofsaid plurality of inner hollow members being in the form of a pair ofhollow conical frustums joined at .their truncated surfaces, said firstinner hollow member carried within and by said outer tank, said secondinner hollow member carried within and by said first inner hollowmember, and channel means adjacent the inlet means for confining theintake to a prescribed path.

References Cited in the le of this patent UNITED STATES PATENTS1,007,823 Tieman Nov. 7, 1911 2,156,123 Mount Apr. 25, 1939 FOREIGNPATENTS I113,743 Switzerland Feb. 1, 1926 706,394 France Mar. 30, 193,1596,518 -Germany May 7, 1934

